4463b11cad
Summary: Migrate names of properties from 'leveldb' prefix to 'rocksdb' prefix. Test Plan: make check Reviewers: emayanke, haobo Reviewed By: haobo CC: leveldb Differential Revision: https://reviews.facebook.net/D13311
66 lines
1.3 KiB
C++
66 lines
1.3 KiB
C++
#pragma once
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#include "rocksdb/env.h"
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#include "rocksdb/statistics.h"
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namespace rocksdb {
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// Auto-scoped.
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// Records the statistic into the corresponding histogram.
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class StopWatch {
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public:
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StopWatch(
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Env * const env,
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std::shared_ptr<Statistics> statistics = nullptr,
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const Histograms histogram_name = DB_GET) :
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env_(env),
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start_time_(env->NowMicros()),
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statistics_(statistics),
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histogram_name_(histogram_name) {}
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uint64_t ElapsedMicros() {
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return env_->NowMicros() - start_time_;
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}
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~StopWatch() {
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if (statistics_) {
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statistics_->measureTime(histogram_name_, ElapsedMicros());
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}
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}
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private:
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Env* const env_;
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const uint64_t start_time_;
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std::shared_ptr<Statistics> statistics_;
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const Histograms histogram_name_;
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};
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// a nano second precision stopwatch
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class StopWatchNano {
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public:
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StopWatchNano(Env* const env, bool auto_start = false)
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: env_(env), start_(0) {
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if (auto_start) {
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Start();
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}
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}
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void Start() { start_ = env_->NowNanos(); }
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uint64_t ElapsedNanos(bool reset = false) {
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auto now = env_->NowNanos();
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auto elapsed = now - start_;
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if (reset) {
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start_ = now;
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}
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return elapsed;
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}
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private:
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Env* const env_;
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uint64_t start_;
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};
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} // namespace rocksdb
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